Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022		Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Leasing revenues		$ 126,800		$ 245,300
Total non-lease revenues				54,403		$ 44,605
Total revenues		177,031	$ 146,435	322,404		267,630
Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		126,824	107,510	245,307		205,464
Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		14,202	10,918	25,589		19,493
Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		35,529	27,607	50,757		41,945
Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		476	400	751		728
Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		50,207	38,925	77,097		62,166
Mobile Modular [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues				35,941		23,067
Total revenues		111,377	84,572	202,022		153,220
Mobile Modular [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		79,671	65,184	154,265		122,987
Mobile Modular [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		6,883	4,584	12,533		7,790
Mobile Modular [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		24,816	14,784	35,191		22,404
Mobile Modular [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		7	20	33		39
Mobile Modular [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		31,706	19,388	47,757		30,233
TRS-RenTelco [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues				11,118		10,800
Total revenues		37,341	33,783	70,832		67,386
TRS-RenTelco [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		30,909	28,717	60,319		56,530
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		683	621	1,235		1,229
TRS-RenTelco [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,462	4,108	8,741		8,984
TRS-RenTelco [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		287	337	537		643
TRS-RenTelco [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		6,432	5,066	10,513		10,856
Adler Tanks [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues				1,777		1,382
Total revenues		23,663	19,958	43,983		37,668
Adler Tanks [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		16,244	13,609	30,723		25,947
Adler Tanks [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		6,636	5,713	11,821		10,474
Adler Tanks [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		601	593	1,258		1,201
Adler Tanks [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		182	43	181		46
Adler Tanks [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		7,419	6,349	13,260		11,721
Enviroplex [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues	[1]			5,567		9,356
Total revenues		4,650	8,122	5,567	[1]	9,356	[1]
Enviroplex [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		4,650	8,122	5,567		9,356
Enviroplex [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		$ 4,650	$ 8,122	$ 5,567		$ 9,356

[1] Gross Enviroplex sales revenues were $6,423 and $10,211 for the six months ended June 30, 2022 and 2021, respectively. There were $856 and $855 inter-segment sales to Mobile Modular in the six months ended June 30, 2022 and 2021, respectively, which required elimination in consolidation.